Test piece for evaluation of arrestability, test for evaluation of arrestability, low-temperature tank, liquid hydrogen tank, method for manufacturing low-temperature tank, and method for manufacturing liquid hydrogen tank

JP2026019659APending Publication Date: 2026-02-05NIPPON STEEL CORPORATION
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Patent Information

Application Number
JP2024121378
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-26
Publication Date
2026-02-05

AI Technical Summary

Technical Problem

Existing methods for evaluating the arrestability of steel materials in low-temperature storage tanks, such as those for LNG and liquid hydrogen, are costly and inefficient, particularly when using large-scale tests like the hybrid ESSO test or requiring expensive refrigerants like liquid helium.

Method used

A compact arrestability evaluation test piece and test method using a run-up plate, test plate, and welded joint with notches, allowing for crack arrest evaluation at lower temperatures and reduced costs, utilizing smaller test pieces and less refrigerant.

Benefits of technology

Enables simple and cost-effective quality control of arrest properties in steel materials, facilitating the production of low-temperature tanks and liquid hydrogen tanks with excellent crack arrestability.

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Abstract

To provide an arrest characteristic evaluation test piece capable of easily performing quality control of an arrest characteristic at a low cost.SOLUTION: A test piece for evaluating arrestability, comprising: an entrance plate; a test plate; and a welded portion that joins the entrance plate and the test plate, wherein the test piece has a notch disposed from an end portion of the entrance plate toward the test plate, and a tip of the notch is located in the entrance plate or the welded portion.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Coated glass bottle

    JP1978004683A